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codegen: gep related fixes 

we can now compile simple programs that uses tuples and lists
This commit is contained in:
pca006132 2021-08-19 16:54:15 +08:00
parent 39545c0005
commit 0e2da0d180
2 changed files with 104 additions and 75 deletions
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155
nac3core/src/codegen/expr.rs
View File

@ -8,12 +8,28 @@ use crate::{
};
use inkwell::{
types::{BasicType, BasicTypeEnum},
values::BasicValueEnum,
values::{BasicValueEnum, IntValue, PointerValue},
AddressSpace,
};
use itertools::{chain, izip, zip, Itertools};
use rustpython_parser::ast::{self, Boolop, Constant, Expr, ExprKind, Operator};
fn assert_int_val<'ctx>(val: BasicValueEnum<'ctx>) -> IntValue<'ctx> {
if let BasicValueEnum::IntValue(v) = val {
v
} else {
unreachable!()
}
}
fn assert_pointer_val<'ctx>(val: BasicValueEnum<'ctx>) -> PointerValue<'ctx> {
if let BasicValueEnum::PointerValue(v) = val {
v
} else {
unreachable!()
}
}
impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
fn get_subst_key(&mut self, obj: Option<Type>, fun: &FunSignature) -> String {
let mut vars = obj
@ -63,10 +79,11 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
let zero = self.ctx.i32_type().const_zero();
unsafe {
for (i, val) in vals.into_iter().enumerate() {
let p = ptr.const_in_bounds_gep(&[
zero,
self.ctx.i32_type().const_int(i as u64, false),
]);
let p = self.builder.build_in_bounds_gep(
ptr,
&[zero, self.ctx.i32_type().const_int(i as u64, false)],
"elemptr",
);
self.builder.build_store(p, val);
}
}
@ -88,7 +105,7 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
) -> Option<BasicValueEnum<'ctx>> {
let key = self.get_subst_key(obj.map(|(a, _)| a), fun.0);
let defs = self.top_level.definitions.read();
let definition = defs.get(fun.1.0).unwrap();
let definition = defs.get(fun.1 .0).unwrap();
let val = if let TopLevelDef::Function { instance_to_symbol, .. } = &*definition.read() {
let symbol = instance_to_symbol.get(&key).unwrap_or_else(|| {
// TODO: codegen for function that are not yet generated
@ -242,14 +259,7 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
ExprKind::Name { id, .. } => {
let ptr = self.var_assignment.get(id).unwrap();
let primitives = &self.primitives;
// we should only dereference primitive types
if [primitives.int32, primitives.int64, primitives.float, primitives.bool]
.contains(&self.unifier.get_representative(expr.custom.unwrap()))
{
self.builder.build_load(*ptr, "load")
} else {
(*ptr).into()
}
}
ExprKind::List { elts, .. } => {
// this shall be optimized later for constant primitive lists...
@ -271,23 +281,26 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
);
let arr_str_ptr = self.builder.build_alloca(arr_ty, "tmparrstr");
unsafe {
let len_ptr =
self.builder.build_in_bounds_gep(arr_str_ptr, &[zero, zero], "len_ptr");
self.builder.build_store(
arr_str_ptr.const_in_bounds_gep(&[zero, zero]),
len_ptr,
self.ctx.i32_type().const_int(elements.len() as u64, false),
);
self.builder.build_store(
arr_str_ptr
.const_in_bounds_gep(&[zero, self.ctx.i32_type().const_int(1, false)]),
arr_ptr,
let ptr_to_arr = self.builder.build_in_bounds_gep(
arr_str_ptr,
&[zero, self.ctx.i32_type().const_int(1, false)],
"ptr_to_arr",
);
let arr_offset = self.ctx.i32_type().const_int(1, false);
self.builder.build_store(ptr_to_arr, arr_ptr);
let i32_type = self.ctx.i32_type();
for (i, v) in elements.iter().enumerate() {
let ptr = self.builder.build_in_bounds_gep(
let elem_ptr = self.builder.build_in_bounds_gep(
arr_ptr,
&[zero, arr_offset, self.ctx.i32_type().const_int(i as u64, false)],
"arr_element",
&[i32_type.const_int(i as u64, false)],
"elem_ptr",
);
self.builder.build_store(ptr, *v);
self.builder.build_store(elem_ptr, *v);
}
}
arr_str_ptr.into()
@ -299,10 +312,11 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
let tuple_ptr = self.builder.build_alloca(tuple_ty, "tuple");
for (i, v) in element_val.into_iter().enumerate() {
unsafe {
let ptr = tuple_ptr.const_in_bounds_gep(&[
zero,
self.ctx.i32_type().const_int(i as u64, false),
]);
let ptr = self.builder.build_in_bounds_gep(
tuple_ptr,
&[zero, self.ctx.i32_type().const_int(i as u64, false)],
"ptr",
);
self.builder.build_store(ptr, v);
}
}
@ -312,27 +326,19 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
// note that we would handle class methods directly in calls
let index = self.get_attr_index(value.custom.unwrap(), attr);
let val = self.gen_expr(value).unwrap();
let ptr = if let BasicValueEnum::PointerValue(v) = val {
v
} else {
unreachable!();
};
let ptr = assert_pointer_val(val);
unsafe {
let ptr = ptr.const_in_bounds_gep(&[
zero,
self.ctx.i32_type().const_int(index as u64, false),
]);
let ptr = self.builder.build_in_bounds_gep(
ptr,
&[zero, self.ctx.i32_type().const_int(index as u64, false)],
"attr",
);
self.builder.build_load(ptr, "field")
}
}
ExprKind::BoolOp { op, values } => {
// requires conditional branches for short-circuiting...
let left =
if let BasicValueEnum::IntValue(left) = self.gen_expr(&values[0]).unwrap() {
left
} else {
unreachable!()
};
let left = assert_int_val(self.gen_expr(&values[0]).unwrap());
let current = self.builder.get_insert_block().unwrap().get_parent().unwrap();
let a_bb = self.ctx.append_basic_block(current, "a");
let b_bb = self.ctx.append_basic_block(current, "b");
@ -344,25 +350,13 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
let a = self.ctx.bool_type().const_int(1, false);
self.builder.build_unconditional_branch(cont_bb);
self.builder.position_at_end(b_bb);
let b = if let BasicValueEnum::IntValue(b) =
self.gen_expr(&values[1]).unwrap()
{
b
} else {
unreachable!()
};
let b = assert_int_val(self.gen_expr(&values[1]).unwrap());
self.builder.build_unconditional_branch(cont_bb);
(a, b)
}
Boolop::And => {
self.builder.position_at_end(a_bb);
let a = if let BasicValueEnum::IntValue(a) =
self.gen_expr(&values[1]).unwrap()
{
a
} else {
unreachable!()
};
let a = assert_int_val(self.gen_expr(&values[1]).unwrap());
self.builder.build_unconditional_branch(cont_bb);
self.builder.position_at_end(b_bb);
let b = self.ctx.bool_type().const_int(0, false);
@ -396,8 +390,7 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
let ty = self.unifier.get_representative(operand.custom.unwrap());
let val = self.gen_expr(operand).unwrap();
if ty == self.primitives.bool {
let val =
if let BasicValueEnum::IntValue(val) = val { val } else { unreachable!() };
let val = assert_int_val(val);
match op {
ast::Unaryop::Invert | ast::Unaryop::Not => {
self.builder.build_not(val, "not").into()
@ -405,8 +398,7 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
_ => val.into(),
}
} else if [self.primitives.int32, self.primitives.int64].contains(&ty) {
let val =
if let BasicValueEnum::IntValue(val) = val { val } else { unreachable!() };
let val = assert_int_val(val);
match op {
ast::Unaryop::USub => self.builder.build_int_neg(val, "neg").into(),
ast::Unaryop::Invert => self.builder.build_not(val, "not").into(),
@ -506,12 +498,7 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
.into() // as there should be at least 1 element, it should never be none
}
ExprKind::IfExp { test, body, orelse } => {
let test = if let BasicValueEnum::IntValue(test) = self.gen_expr(test).unwrap() {
test
} else {
unreachable!()
};
let test = assert_int_val(self.gen_expr(test).unwrap());
let current = self.builder.get_insert_block().unwrap().get_parent().unwrap();
let then_bb = self.ctx.append_basic_block(current, "then");
let else_bb = self.ctx.append_basic_block(current, "else");
@ -551,6 +538,42 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
unimplemented!()
}
}
ExprKind::Subscript { value, slice, .. } => {
if let TypeEnum::TList { ty } = &*self.unifier.get_ty(value.custom.unwrap()) {
if let ExprKind::Slice { .. } = slice.node {
unimplemented!()
} else {
// TODO: bound check
let i32_type = self.ctx.i32_type();
let v = assert_pointer_val(self.gen_expr(value).unwrap());
let index = assert_int_val(self.gen_expr(slice).unwrap());
unsafe {
let ptr_to_arr = self.builder.build_in_bounds_gep(
v,
&[i32_type.const_zero(), i32_type.const_int(1, false)],
"ptr_to_arr",
);
let arr_ptr =
assert_pointer_val(self.builder.build_load(ptr_to_arr, "loadptr"));
let ptr = self.builder.build_gep(arr_ptr, &[index], "loadarrgep");
println!("building element pointer");
self.builder.build_load(ptr, "loadarr")
}
}
} else {
let i32_type = self.ctx.i32_type();
let v = assert_pointer_val(self.gen_expr(value).unwrap());
let index = assert_int_val(self.gen_expr(slice).unwrap());
unsafe {
let ptr_to_elem = self.builder.build_in_bounds_gep(
v,
&[i32_type.const_zero(), index],
"ptr_to_elem",
);
self.builder.build_load(ptr_to_elem, "loadelem")
}
}
}
_ => unimplemented!(),
})
}

18
nac3core/src/codegen/stmt.rs
View File

@ -35,10 +35,14 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
unreachable!();
};
unsafe {
ptr.const_in_bounds_gep(&[
self.builder.build_in_bounds_gep(
ptr,
&[
self.ctx.i32_type().const_zero(),
self.ctx.i32_type().const_int(index as u64, false),
])
],
"attr",
)
}
}
ExprKind::Subscript { .. } => unimplemented!(),
@ -47,14 +51,16 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
}
fn gen_assignment(&mut self, target: &Expr<Option<Type>>, value: BasicValueEnum<'ctx>) {
let i32_type = self.ctx.i32_type();
if let ExprKind::Tuple { elts, .. } = &target.node {
if let BasicValueEnum::PointerValue(ptr) = value {
for (i, elt) in elts.iter().enumerate() {
unsafe {
let t = ptr.const_in_bounds_gep(&[
self.ctx.i32_type().const_zero(),
self.ctx.i32_type().const_int(i as u64, false),
]);
let t = self.builder.build_in_bounds_gep(
ptr,
&[i32_type.const_zero(), i32_type.const_int(i as u64, false)],
"elem",
);
let v = self.builder.build_load(t, "tmpload");
self.gen_assignment(elt, v);
}